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DLE 20 vs. DLE20RA

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Old 09-21-2019, 05:24 PM
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jet jocky97
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Default DLE 20 vs. DLE20RA

what is the size and engine performance difference between the DLE 20 and the DLE20RA. Thanks for the help.
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Old 09-24-2019, 03:32 AM
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ahicks
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They both pull the same size props at the same rpm.
The big differences (other than the obvious RA's smaller footprint) are that the RA's rear exhaust comes standard, where the side exhaust engine needs a rather expensive "wrap around" muffler to do the same thing. The downside to the RA is that the carb is located right above the muffler, and on warm days a tightly cowled engine will have a tendency to vapor lock if it's not allowed to cool for a while between flights.
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Old 09-24-2019, 05:08 AM
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jet jocky97
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thanks for the help and info.
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Old 09-24-2019, 02:08 PM
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+1 to ahicks comments. I might add a bit more about all the DLE rear exhaust engines. They can all benefit from baffling of the cylinder in any cowling because the muffler tends to restrict airflow through the cooling fins. Baffling will help assure the airflow goes through the fins and not just past around them. Make sure also there is some cooling airflow through the whole cowl to prevent stagnant air and local hot spots in the cowl. Two locals had a problem with vapor lock and lean running and opening just a couple of air passages in the upper cowl eliminated the problem entirely. One was a J-3 Cub. I also like to put a metal shield between the carb and muffler as additional insurance for a cool carb. Nothing special, just a bent piece of aluminum with a right angle bend where it attaches to the firewall. Darn good engines but you need to take a few steps to assure you donít create a problem during installation. The same tips would apply to any brand of rear carb, rear exhaust engines where the carb is near the muffler. Note that some of the RCGF rear exhaust engines use a metal baffle to help airfow around the back side of the cylinder.
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